For the extra bit of style and performance, add a Kartboy Delrin Shift Knob to your Kartboy Shift Lever (works with the stock lever as well.) This computer designed and CNC turned Aluminum knob fits the hand with comfort, but allows a firm grip for crucial shifts. No set screws or cheezy adapter sleeves to add, it is internally threaded. For the ultimate in compatibility, a groove is included to hold up the shift boot. Kartboy Barcode Pattern Logo Sold Separately.